TY - JOUR
T1 - Heavy-metal inhibition of nitrification in selected Iowa soils treated with Stay-N 2000
AU - Rovita, D.
AU - Killorn, R.
PY - 2008/4
Y1 - 2008/4
N2 - Heavy-metal inhibition of nitrification in soils treated with reformulated nitrapyrin was investigated. Clarion and Okoboji soils were treated with ammonium sulfate [(NH4)2SO4] and a nitrification inhibitor. Copper(II) (Cu), Zinc(II) (Zn), Cadmium(II) (Cd), or Lead(II) (Pb) were added to each soil. A first-order equation was used to calculate the maximum nitrification rate (Kmax), duration of lag period (t′), period of maximum nitrification (Δt), and the termination period of nitrification (ts). In the Clarion soil, the Kmax decreased from 12 mg kg-1 d-1 without the nitrification inhibitor to 4, 0.25, 0.86, and 0.27 mg kg-1 d-1, respectively, when the inhibitor and Cu, Zn, Pb, or Cd were applied. In the Okoboji soil, Kmax decreased from 22 mg kg-1 d-1 with no inhibitor to 6, 3, 4, and 2 mg kg-1 d-1, respectively, when an inhibitor and Cu, Zn, Pb, or Cd were added. The t′ varied from 8 to 25 d in the Clarion soil and from 5 to 25 d in the Okoboji soil, due to addition of Cu, Zn, Pb, or Cd and the inhibitor.
AB - Heavy-metal inhibition of nitrification in soils treated with reformulated nitrapyrin was investigated. Clarion and Okoboji soils were treated with ammonium sulfate [(NH4)2SO4] and a nitrification inhibitor. Copper(II) (Cu), Zinc(II) (Zn), Cadmium(II) (Cd), or Lead(II) (Pb) were added to each soil. A first-order equation was used to calculate the maximum nitrification rate (Kmax), duration of lag period (t′), period of maximum nitrification (Δt), and the termination period of nitrification (ts). In the Clarion soil, the Kmax decreased from 12 mg kg-1 d-1 without the nitrification inhibitor to 4, 0.25, 0.86, and 0.27 mg kg-1 d-1, respectively, when the inhibitor and Cu, Zn, Pb, or Cd were applied. In the Okoboji soil, Kmax decreased from 22 mg kg-1 d-1 with no inhibitor to 6, 3, 4, and 2 mg kg-1 d-1, respectively, when an inhibitor and Cu, Zn, Pb, or Cd were added. The t′ varied from 8 to 25 d in the Clarion soil and from 5 to 25 d in the Okoboji soil, due to addition of Cu, Zn, Pb, or Cd and the inhibitor.
KW - Heavy metals
KW - Nitrification
KW - Nitrification inhibitor
UR - http://www.scopus.com/inward/record.url?scp=41349104928&partnerID=8YFLogxK
U2 - 10.1080/00103620801925349
DO - 10.1080/00103620801925349
M3 - Article
AN - SCOPUS:41349104928
SN - 0010-3624
VL - 39
SP - 972
EP - 982
JO - Communications in Soil Science and Plant Analysis
JF - Communications in Soil Science and Plant Analysis
IS - 7-8
ER -